Stand tor sewing-machines



L. C. KIEHNLE.

sumo FOR SEWING MACHINES.

APPLICATIUNI FILED SEPT. 7|. I918.

lutonivd.lu110 IT, 1919.

INVENTOR Lea C/fwimla,

WITNESSES to the treadle, a

UNITED STATES PATENT OFFICE.

LEO C. KIEHNLE, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANUFAC- TURING COMPANY, A CORPORATION OF NEW JERSEY.

STAND r012. SEWING-MACHINES.

To all whom it may concern.

Be it known that I, LEO C. KIE NLE, a citizen. of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Stands for SewingMahines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to stands for sewing machines of the unittype largely .employed in factories supplied with electricity or equipped with machines for electri cal generation.

In stands for sewing machines equipped with individual motors for the electrical operation of the' machines, it has been found desirable to provide for manual op eration byfoot power when, for one cause or another, the flow terrupted. The present invention aims to provide convenient and simple devices for expeditiously chz-inging from electrical to foot-power operation without an unnecessary waste of time and without needlessly encuin'bering the machine. .-The invention also contemplates a disposition and arrange ment of a motor, a rheostat and a driving fly-wheel which is compact and not unsightly.

In one form the invention comprises a standard fitted with a motor, a rl'ieostat or starting box and a fly-wheel or driving pulley all arranged beneath the table which is supported by a frame between whose legs is arranged a treadle adapted to be connected by a pituran with either an ope -ating switch of the rheostat or a crank on the tiy-wheel or driving pulley. The pitinan mentioned comprises a section articulated second one piece section connected to the crank of the driving pulley and a third adjustable and bent sect/ion con nected to the operating switch of the rheo- Stall]. The adjacent ends of the three pitman sections are suitably threaded, both of the second and third mentioned sections'bein b externally threaded for reception by the internally threaded end of the first mentioned section. By

Specification of Letters Patent.

. tioned section of of electrical energy is inbrake vheel 10 on its rotor,

connecting up the first-men the pitman with one or the other of the two remaining sections of the pitman the sewing machine may be 01)- erated by foot power or by electrical energy as desired. Then by reason of storms, short-circuits or accident-s the flow of electricity to the motor is interrupted, the operator may continue her work without any considerable loss of time by merely coupling the machine up for treadlc operation by f0ot=power.

The in .*ention is illustrated in the accompanying drawings in which Figure 1 is a rear v ew in perspective of a stand with a,se wing machine head positioned thereon. Fig. 2 is an end elevation of the stand and Fig.

3 is a detail of a section of a pitman which is articulated to the foot-t-readle.

As illustrated in the d'awings, the machine head indicated at 1 rests upon a table 2 supported by the leg standards 3 which. are connected by the brace Between the leg standards 3 a foot-treadle 5 is pivotally supported within convenient reach of an op crators foot. Adjacent one of the leg standards 3 a. driving pulley (i with a crank 7 is rotatably supported in the frame.

By the table and therebeneath is supported a motor 8 having a belt-pulley 9 and a the motor being disposed between the driving pulley 6 and the remote leg standard driving pulley 6 and on the opposite side of one of the leg standards 3'is a rheostat 11 of any suitable design having an operating lever or switch 12 for cutting out, resistance and gradually hit-roasting the flow of electrical energy to the motor through the wiring indicated at 18 and 11 when the machine is started up. A brake-shoe 15, adapted to bear on the bra ke-whee1 fixed to the rod 16, is fllll'llllllQd in the upper part of the rheostat or starting box and a spring 17 coiled about the rod tends to apply the brake to stop the operation 01 the rotor and to simultaneously throw the starting switch 12 to a positionin which the circuit is open.

On the shaft in the sewing nuochine having a belt-groove Patented June 1'7, 1919. Application filed September 21, 1918. Serial No. 255,091.

Adjacent the i sections 30 and connecting the to unshift the either the'belt 23 running to the motor ,8 pr the belt 24 running to the driving pul- The foot-treadle 5 is provided rearwardly with an ear 25 pierced to receive-the socket 26 which is clamped thereto by the cupended screw 26 and jam-nut 26". The socket 26 embraces the ball end 27 of one end of a pitman section 28 whose opposite end 29 is internally threaded. A second one-piece pitmansection 30, strapped at 31 about the crank], has its lower end 32 externa-lly threaded for disengageable connection with the internally threaded end 29 of'the pitman section 28. A third pitman section 33,- consisting of two rods adjustably held together by a clamp 3;, is con-' nected at its upper end througha crankarm 35 on the rod 16 to the operating switch 12 of the rheostat and has its lower end 36- externally threaded for disengageable connection with the internally threaded end of the pitman section 28. One rod of this third pitman section 33 is bent intermediate its ends as indicated at 37 to clear the driving] pulley 7. The pitman section 28 may be turned to connect it with either of the sections 31 and 33.

With the described construction and arrangement it will I tion in the flow of electricity to-the motor-- need cause the operator to lose ,no'considera'ble time in awating the resumption of the flow because by merely disconnecting the section 33 of the pitman from the section 28 and latter with the section 30 of the machine may be operated by it being of course necessary also motor-belt 23 from the groovg. 22 in the hand-wheel and substitute the pulley-belt 24r- When'either of the pitman 33 is disconnected, it hangs out of the way of the other pitman section.

Having thus set forth the nature of the invention, what I claim hereinisz- 1. In combination, a stand for sewing machines including a table and a supportin frame comprising spaced leg standards an a brace connecting the same, adriving pulley supported between and. adjacentone of the le standards, a ioot-treadle, affnotor sustained beneath the table and located between the driving pulleyand the other. of said leg standards, a rheostat or starting box having an operating switch and located beneath the table outside of the leg standardsa' and adjacent thedriving pulley, wiring between a source of electrical energy and the rheostat and between the rheostat and the motcnapair of driving belts which are adapted to operate ,the machine from the motor and from the driving pulley respectively, and a scctionalpitman for actuation of either the driving pulley or the opcrating switch of the rheostatwhcn it is dethe pitman, foot-power,

tively to said power and sustain be seen thatan interrupsaid .leg stander adapted man aving three sections one of whic is adapted to be, connected with either of the other two sections to enable the operator through the foot to manually operate the machine or to govern its electrical operation.

3. Inc stand for sewing machines, ower and manual driving devices operative y arranged to operate'the machine and including a foot-treadle, aitman section articulated to the foot-tree e, and a pair of endthreaded pitman sectionsc'onnected respee manual driving de-. vices andflada ted tosheconnected to the first mentione pitmansection which isalso threaded at (inc end. I 4. In combination, astandfor sewing machines includixig a table and a supporting frame comprisin spaoed'leg standards and a 'brace connecting the same, a 9!; pulley supported between andadjacent one of'the le standards a foot-treadle, a motor beneatlithe table ;and located between'the dri gs'pulle 'and' the other of box having an operating switch and located beneath the table outside of the leg standards and adjacent the driving pulley, wirin between a source of electrical, energy an the rheostat and between the rheostat and the motor, a pair of driving belts which are to operate the machine from the motor and fro the driving pulley respectively, a itmam section at one end having aball-an socket connection with the foottread-1e andiat-its other end being threaded, a second one piece pitman section connected to'the, driving pulley, and a. third adjustable pitman section operatively connected to the starting switch of the rheostat whereby the 11 machine through foot power may be o'perated manually or may be governed in its electrical operation. I k

5. In combination, a stand for sewing machines including a table and a supporting 11: frame comprising spaced leg standards and a brace connecting the same, a driving pulley supported between and adjacent one of the leg standards,

a r eostat or starting an iiveiy, a pi'i-mamsect-ien at me and having a 32111 and sockat cannectien with the f00tflea-file 9,116} at its @116? end being threaded, a secend .one-piece pitmim section connected to the pulley, and 8, third pitmqn sec-ition eperatwely conneabs'd t0 the starting switch of the sheastat whereby the machine hrough foot pewer may in; opm'mved 1113-1111- operation, said thisd pitman any or may be gcwsrned in. its eiesfirica sacsion being 18 bent interme iate its ends go clear the drivin pulley.

teshimony whereef, I have signed my name ta this specification.

LE0 c. KIEHNLE. Y 

